docs: def ckobj(ck, outCell=None):
      """
      Find the set of ID codes of all objects in a specified CK file.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/ckobj_c.html
  
      :param ck: Name of CK file.
      :type ck: str
      :param outCell: Optional user provided Spice Int cell.
      :type outCell: Optional spiceypy.utils.support_types.SpiceCell
      :return: Set of ID codes of objects in CK file.
      :rtype: spiceypy.utils.support_types.SpiceCell
      """
      assert isinstance(ck, str)
      ck = stypes.stringToCharP(ck)
      if not outCell:
          outCell = stypes.SPICEINT_CELL(1000)
      assert isinstance(outCell, stypes.SpiceCell)
      assert outCell.dtype == 2
      libspice.ckobj_c(ck, ctypes.byref(outCell))
      return outCell